Team Penske's Castroneves passed J.R. Hildebrand for the lead after pitting for the second and final time and went on to claim his third IndyCar race on the streets of St. Petersburg, Fla.
He logged a triumph while driving IndyCar's new "DW12" car -- named in honor of Dan Wheldon, who died last year during a five-car crash at Las Vegas Motor Speedway.
Target Chip Ganassi Racing's Scott Dixon ended up 5.5 seconds behind Castroneves for second place.
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